[Orgmode] numbered outlines?

From:

David Rogoff

Subject:

[Orgmode] numbered outlines?

Date:

Wed, 20 Oct 2010 12:20:43 -0700

User-agent:

Postbox 2.0.1 (Macintosh/20101011)

Sorry if this is obvious, but I couldn't find anything on it.
orgmode's use of asterisks for outline levels is fine when I'm working
on something by myself. However, if I'm collaborating with other
people, there's no good way to reference a particular outline entry. Is
there a way to get org-mode to use numbering (e.g. 1, 1.1, 1.1.1 ) for
outline levels? If not, how can you work with other people on an outline?